Airbag control unit with part number 65.77-6963024

What does the airbag control unit 65.77-6963024 do?

The airbag control unit 65.77-6963024 controls the SRS restraint system of BMW. In a crash it evaluates the sensors and determines which airbags and seatbelt pretensioners are triggered; at the same time, it monitors the entire system.

If it detects a fault, it reports this via the airbag warning light. After an accident, it stores crash data and locks itself.

The control unit works discreetly in the background until a fault occurs.

Why does the control unit 65.77-6963024 fail?

The most common cause of a failure of the 65.77-6963024 is stored crash data from an accident, even if no airbag has deployed; a normal diagnostic tool cannot erase them. Ageing electronic components, cold solder joints, moisture and corrosion at connectors and voltage spikes are also possible.

The crash data arise from the event and remain in the memory of the control unit.

The other causes concern the technology in everyday use: components age, solder joints can lose contact, moisture attacks connectors, and voltage spikes when starting or with a weak battery put strain on the electronics.

How can you tell that the 65.77-6963024 is defective?

You recognise a defect in the 65.77-6963024 by the airbag warning light, which lights up permanently or intermittently, by an error message on the instrument cluster, or by the diagnostic tool not establishing a connection to the control unit. A fault memory that cannot be cleared is also a sign.

The warning light is the device's feedback to you. The signs at a glance:

• Airbag warning light is lit permanently
• Airbag warning light is lit only intermittently
• Error message on the instrument cluster
• Diagnostic tool receives no connection to the control unit
• Fault memory cannot be cleared

If the control unit is defective, the airbags and seatbelt pretensioners may not trigger in an emergency.

Which vehicles is the 65.77-6963024 fitted in?

The airbag control unit 65.77-6963024 is fitted in these vehicles: BMW 5 Series E60 LCI Saloon (2007-2010) and E60 Saloon (2003-2007).

These vehicles are listed below.

• BMW 5 Series E60 LCI Saloon (2007-2010)
• BMW 5 Series E60 Saloon (2003-2007)

Two pieces of advice belong here. Comparing the part number on the label of the removed unit with this page only confirms that you have the correct unit. Have the fault memory read out in advance, because only its contents show whether the control unit or a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 31911421401V, 65 77 9 118 749 01, 65 77 911 4214-01, 65.77 9172018-01, 65.77-6946384, 65.77-6946388.

How does the repair of the 65.77-6963024 work?

First, the fault memory is read out and the log enclosed. Disconnect the battery, remove the control unit, in that order. Then create the repair order online and send the 65.77-6963024 in well packed. At Airbag24, checking, repairing and testing take 3–4 working days as a rule.

At Airbag24, the unit is checked, defective components are replaced, the stored crash data are erased, and finally a function test is carried out. You then receive the unit back in repaired form.

Our repairs come with 2 years' statutory liability for defects. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit 65.77-6963024 get to Airbag24?

You send the 65.77-6963024 as a parcel or arrange a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

A shock-proof box with the printed repair order is the safe choice.